Method and device for feeding a number of flat subproducts to a serial subsequent processing

ABSTRACT

For supplying individual quantities of flat and in particular diverse part products to a serial further processing, the part products are arranged in a row of part product groups ( 7 ) in a preparatory step carried out before the supply step (e.g. supplementation), and the row ( 2 ) is fashioned into a “first-in-last-out” storage formation, such as a roll ( 5 ). Within the row ( 2 ) the part products or the part product groups ( 7 ) overlap or are spaced from each other. For stabilizing the part product groups ( 7 ), adhesion between the part products within the groups may be enhanced; for stabilizing the storage formation, the part product groups ( 7 ) may be reversibly connected to each other. For supplying the groups to the serial further processing, which may succeed the preparatory step at any time or place, the storage formation is dissolved and the part product groups are supplied to the further processing directly from the storage formation. The preparatory step is completely uncoupled from the supply step, which simplifies the method and the installation for both, the supply and the further processing.

The invention is located in the field of further processing printed products and concerns a method and an installation according to the generic parts of the corresponding independent claims. Method and installation according to the invention serve the supply of individual quantities of flat part products to a serial further processing, wherein the part products of a quantity are in particular different from each other. Method and installation serve in particular the supplementation of printed products conveyed in a serial conveying stream by adding a quantity of part products to each one of the printed products.

Printed products such as e.g. newspapers or periodicals are often supplemented by adding various part products such as e.g. inserts, prospectuses, single leaflets, smaller brochures, reply cards, or even flat sample articles or sample sachets. To this end, the printed products are usually conveyed along a supplementation track past a row of feed points, wherein at each feed point one part product of a specific part product type is added to each printed product, for instance by inserting the part product into, or placing it upon the printed product. The supplemented printed products are then packaged e.g. in batches or individually.

In particular if high capacities are required, the realization of the supplementation track demands elaborate installations such as e.g. an insertion drum with various feed points being equipped depending on format and kind of the part product type to be handled, wherein the part products often need to be supplied manually to the feed points. The greater the number of diverse part products to be added to each printed product, the greater the number of feed points needed and the larger or longer the supplementation installation becomes. If the number of the part products varies in successive supplementation processes, the installation needs to be dimensioned to suit the greatest number to be expected and it is on average therefore utilized to a limited extent only. If the types of part products differ greatly in successive supplementation processes, feed point equipment may have to be exchanged or reset between such processes.

It is the object of the invention to create a method and an installation for supplying individual quantities of, in particular diverse, part products to a serial further processing, in particular, it serves for supplementing printed products conveyed in series, by adding a quantity of part products to each printed product. Therein the invention is to simplify such supply in particular concerning the installation and all the same the invention is to enable, compared with state of the art methods, similar or greater capacities. Nevertheless, the method according to the invention should not limit either the properties of the part products as such, or the diversity of these properties, nor the way in which the part products are manufactured.

This object is achieved by the method and the installation as defined in the claims.

In the following, the method and the installation according to the invention are described by way of the example of the aforementioned supplementation of printed products by adding to each printed product a quantity of part products. However, the invention is not in any way limited to such supplementation. It is equally applicable e.g. to the insertion of a quantity of flat products into an envelope, or to another method of packaging a quantity of flat products, in particular of printed products.

According to the invention, the part products, with which the printed products are to be supplemented, are arranged in part product groups in a preparatory step before supplementation. Each part product group comprises the part products to be added to printed products, and the part product groups are arranged in succession in a row forming a storage formation. The row of part product groups is produced and fashioned as a storage formation in one longitudinal direction, and the storage formation is dissolved in the opposite direction, thus representing a so-called “first-in-last-out” storage. In the actual supplementation step, which follows the preparatory step at any given time, the storage formation is positioned and unravelled for supplying part product groups to a stream of printed products. At this single feed point one part product group is added to each one of the printed products directly from the storage formation, e.g. by insertion.

The named preparatory step (producing row of part product groups and fashioning row into storage formation) is completely separate, in time and place, from the actual supplementation step (each printed product being supplemented with one part product group from the storage formation). I.e. the storage formations produced in the preparatory step are suitable for being transported and stored, and they are usually transported and temporarily stored between their assembly and their unravelling. Due to this complete separation of the preparatory step and the supplementation step, the supplementation capacity, which should preferably be consistent with the production capacity of the printed products to be supplemented, becomes completely independent of the capacity, which can be achieved in the preparatory step. The part products, usually produced prior to the printed products to be supplemented, can be grouped at any given time and with any given capacity, i.e. the installations used in this process do not need to be high-performance installations. For the supplementation-step only one feed point is needed for supplying a plurality of different part product types, so that the supplementation installation can be kept small and compact. Furthermore, there is no need for any precautions to prevent conflicts between part products to be added in succession, which further simplifies the supplementation installation.

According to the preferred embodiment of the method according to the invention, the storage formation produced in the preparatory step is a roll, i.e. a roll core onto which the row of part product groups is wound with the aid of a winding band.

The row of part product groups to be rolled is advantageously produced by gathering supply streams of the individual part product types. The supply streams to be gathered have the same speed and the same supply capacity (part products per time unit). Regarding product orientation and phase, the supply streams are adapted to the means used for separating the groups from the storage formation or the row respectively, in such a way that each part product group can be separated without the need to displace the part products within the group or to displace a succeeding group. For the gathering, the supply streams are produced from rolls or other storage formations (stacks, bundles, parcels) and/or are supplied on-line, e.g. from a printing machine. The row of part product groups can also be produced by collating, wherein the different part product types are supplied to the collating process, e.g. by sheet feeders.

In the rolled-up row, the part product groups are arranged in such a relation to each other that all part products of a front-most group (in unwinding direction) can be easily gripped, e.g. by a gripper. Alternatively, adhesion between the part products within the groups is such (possibly by additional group stabilization or transverse stabilization), that the groups can be inserted into the printed products as a stable unit, without the need of being gripped. For stabilizing the rolls, the part product groups are advantageously arranged in the row in an overlapping manner. If this is not the case, it is advantageous for the stabilization of the rolls to loosely connect the groups (row stabilization or longitudinal stabilization).

The method and the installation according to the invention are described in detail in connection with the following Figs., wherein:

FIG. 1 is a diagram of the method according to the invention;

FIGS. 2 and 3 show two exemplary embodiments of the row of part product groups and of the separation of the groups from the row, wherein the part products or the groups overlap in the row;

FIGS. 4 and 5 show two further embodiments of the row of part product groups, in which the groups overlap;

FIGS. 6 and 7 show two further embodiments of the row of part product groups, wherein the groups are arranged and stabilized in succession within the row (transverse stabilization);

FIG. 8 shows a further embodiment of the row of part product groups, wherein the groups are arranged in succession within the row and are loosely connected (longitudinal and transverse stabilization);

FIG. 9 shows a further embodiment of the row of part product groups, in which the individual part product types overlap and wherein the row is stabilized longitudinally, e.g. by supporting bands.

FIG. 1 shows very schematically the method according to the invention with a roll as storage formation. A plurality of e.g. three supply streams 1 of identical speed and identical capacity (supplied part products per time unit) is gathered, so that the supply streams form together a row 2 of part product groups. Exemplary versions of such rows of part product groups are illustrated in the following Figs. From the row 2 of part product groups, a storage formation is produced on-line, wherefore the row 2 is wound on to a roll core 4, e.g. with the aid of a winding band 3 (winding direction D).

For producing the roll 5 and for unravelling it, per se known winding stations are used. The roll 5 may have a diameter of up to circa two meters and a weight of up to two tons. The roll core 4 may be arranged rotatingly on a mobile roll support, so that the rolls 5 are transported and handled held by the roll support and together with the latter. The rolls 5 can, however, also be handled and transported as such, or recumbent on a pallet.

For the supplementation step, the roll 5 is unravelled (unwinding direction E), wherein the row 2 of part product groups is, at least partly, restored, albeit moving in the opposite direction to that of the winding process. Thus the trailing edges of the part products or the leading sides of the part product groups, when wound, become the leading edges or trailing sides, when unravelled. The restored row 2 is illustrated in FIG. 1 viewed parallel to the flat extension of the part products, immediately following the roll 5, and viewed from above, further away from roll 5. At a feed point 6, the front-most part product group 7 at the head of the unravelled row 2 is separated from row 2 and is added to a printed product, which is conveyed past the feed point 6 in parallel or transverse to the conveying direction in a serial stream of printed products.

FIG. 2 shows, in more detail than FIG. 1, a first exemplary embodiment of a row 2 of part product groups 7, each group containing a part product of each type A, B and C. The row 2 illustrated in FIG. 2 is suitable for a separation of the groups by lateral gripping, i.e. by gripping the product edges oriented parallel to the direction E.

The row 2 is produced by gathering the supply streams 1.1 (part product type A), 1.2 (part product type B) and 1.3 (part product type C), wherein the illustrated supply streams are all imbricated streams, in which the leading product edges are lying on the upper side of the stream. For gathering, all supply streams are of the same speed and the same supply capacity, i.e. the distance between identical points of successive part products are the same in each supply stream. The row is produced in the direction indicated by the arrow D, and resolved for supplementation in the direction indicated by the arrow E. The illustrated part of the row 2 is therefore the tail end when being produced, but on dissolution it is the front end, from which groups 7 are separated.

To enable lateral gripping for the group separation (arrow F, vertical to D and E) as the row is dissolved, the longitudinal edges on one side of all supply streams are aligned when being gathered. Also, the phase differences between the supply streams are selected in such a manner that all part products A, B and C of the group to be separated at the head of the dissolving row 2 protrude from the part products of a consecutive group. Group separation is realized by gripping the edges indicated with 10, e.g. by grippers which separate the gripped group from the row 2, e.g. in direction F, and immediately pass it on to the printed product. The gripped group can also be separated from the front of the row in direction E, wherein the group needs to be accelerated for this purpose.

For gripping the part product groups by the edges transverse to the conveying direction E, it is advantageous to align the trailing (on row production) product edges and to gather the supply streams such that their middle lines are superimposed.

It is evident from FIG. 2 that it is not particularly relevant whether the leading product edges lie on the upper or lower side of the imbricated supply streams 1.1, 1.2 and 1.3. It is further evident that, in a supply stream of very small part products, or possibly in all the supply streams, the part products can be arranged in succession rather than overlapping, i.e. not form an imbricated stream. As already mentioned above, the row 2 of part product groups 7, illustrated in FIG. 2, can be produced by gathering the supply streams 1.1 to 1.3, or the part products can be collated.

FIG. 3 shows in a similar presentation as FIG. 2, a further row 2 of part product groups 7, and a part product group 7 separated from the head end of row 2. In row 2, the part products are arranged essentially diagonally, one product corner of all part products of a group being aligned. Some of the part products overlap in the row 2, wherein the overlapping may concern the whole groups (as illustrated) or the products of each type (as shown in FIG. 2). Row 2 according to FIG. 3 is suitable for lateral gripping or for gripping in the area of the aligned product corners. The separation of the gripped groups occurs, e.g. in a direction indicated by the arrow F.

FIG. 4 shows the production of a further row 2 of part product groups 7. In a pre-row 2′ the leading product edges are aligned. From this pre-row 2′, the part product groups are separated and e.g. by use of a cell wheel are rotated by 180°, and are placed in overlapping alignment in the row 2. This row 2, in which not the part products of each type but the whole groups overlap and in which the aligned edges of the part products in each group are trailing, is wound on roll 5 (winding direction D) and unravelled (unwinding direction E) for use, wherein the groups can be gripped from their leading side, i.e. at the aligned product edges.

FIG. 5 shows a further embodiment of a row 2 of part product groups 7, which is wound on a roll 5 in a preparatory step preceding the supplementation step. In this row it is again the part product groups 7 which overlap, wherein the part products of each group are aligned by a longitudinal edge and the groups are advantageously laterally gripped for separation.

FIG. 6 shows a further embodiment of a row 2 of part product groups 7, wherein the groups do not overlap in the row but are arranged at a distance from each other. Such a row is particularly suitable for unsupported separation and supply of the part product groups, i.e. without gripping the front most part product group of the row after unravelling of the roll 5. In order that the part product groups remain stable during such unsupported separation and supply, it is advantageous to stabilize them (transverse stabilizing). For that purpose a stabilizing means 20 is provided, with which e.g. adhesion between the part products in each group is increased, e.g. by use of ultrasound or by static charge.

FIG. 7, like FIG. 6, shows a row 2 of part product groups 7 arranged in succession, stabilized within themselves (transverse stabilization). The part products are single sheets connected by, possibly perforated, folding edges, so that each group represents a single layered or multilayered folded stack. It is also conceivable to connect or keep connected (longitudinal stabilizing) the top and bottom sheet of each stack (part product group 7), with the top or bottom sheet of the neighboring group, respectively. The folded stacks are then arranged in a row 2, corresponding with the groups illustrated in FIG. 6, but essentially without gaps, and they are separated from each other as each one is separated from the front of the row 2, i.e. immediately prior to being added to the printed products. Isolated folded stacks can also be arranged in an imbricated stream as shown in FIG. 5.

FIG. 8 also shows a row 2 of part product groups 7, which are connected in the row, wherein the connecting means not only stabilizes the row by connecting the groups but also stabilizes the groups by connecting the part products within them (longitudinal and transverse stabilizing). A row of part product groups 7 being distanced from each other, the row being produced e.g. by collating, is conveyed on to a continuous web of foil 30. The foil is placed around the groups 7 by suitable means and is closed above the groups, as illustrated in the sections I and II (section planes transverse to the longitudinal expansion of the row 2). Then the length of foil 30 is welded between the part product groups 7 (welding device 31), so that the successive groups in row 2 represent parcels being connected to each other. The row 2 thus stabilized, is wound onto the roll, and is then unravelled as required and dissolved for the supplementation, wherein the parcels are separated from the front of the row 2 and added as such to the printed products.

FIG. 9 shows a further kind of longitudinal stabilizing of the row 2 of part product groups 7. Here, supporting bands 3.1 and 3.2, or supporting foils or supporting strings, extending along the entire length of the row, serve as stabilizing means. They are positioned between supply streams 1.1, 1.2 and 1.3, as described e.g. in connection with the FIGS. 1 and 2. The supporting bands may or may not be stretched in the roll. Advantageously, they are narrower than at least some of the part product types, so that e.g. aligned longitudinal edges of the part products can be gripped for group separation, without the supporting bands being gripped as well, and each group thus gripped can be withdrawn from the supporting bands 3.1 and 3.2. The supporting bands, foils or strings, are advantageously rewound when the roll dissolves, and are reused for the next roll, as is also the case for the winding band. 

1. A method for supplying individual quantities of flat part products to a serial further processing, wherein, in a preparatory step, part product groups (7), each comprising one of said individual quantities of part products, are arranged in a row (2), in a first direction (D), the row (2) is fashioned into a storage formation, and wherein, in a supply step, which is independent of time and place of the preparatory step, the storage formation is dissolved in a second direction (E), opposite to the first direction (D), and, from a front end of the row (2) being restored by dissolving, part product groups (7) are successively separated to be supplied immediately to the serial further processing, wherein, in the preparatory step and before fashioning of the storage formation, the part product groups being arranged in the row are turned by 180° such that a region of the part product groups being the leading region before the turning becomes the trailing region after the being turned.
 2. The method according to claim 1, wherein the further processing is a supplementation of printed products (8), wherein the printed products (8) are conveyed in a serial stream (9), and one part product group (7) is added to each printed product (8) in the course of said conveyance.
 3. The method according to claim 1 wherein the storage formation is a roll (5), in which the row (2) of part product groups (7) is wound on to a roll core (4) with a winding band (3).
 4. The method according to claim 1, wherein the row (2) of part product groups (7) is produced by gathering supply streams (1.1, 1.2, 1.3) of plural types (A, B, C) of part products, wherein the supply streams to be gathered are of identical speed and identical supply capacity.
 5. The method according to claim 1, wherein the row (2) of part product groups (7) is produced by collating the part products.
 6. The method according to claim 1 wherein the row (2) is produced such that the part product groups (7) overlap or such that the part products overlap or such that the part product groups are spaced from each other.
 7. The method according to claim 6, wherein the row (2) is produced such that one edge or one corner of the part products of each part product group (7) are aligned, and wherein, for separating the part product groups from the restored row (2), each part product group (7) is gripped in a range (10) of said aligned edges or corners.
 8. The method according to claim 7, wherein the aligned edges are the leading edges before the turning of the part product groups, are the trailing edges on storage formation fashioning, and are again the leading edges on separation of the groups from the restored row.
 9. The method according to claim 1, wherein the part products within the part product groups (7) are stabilized by increasing adhesion between the part products.
 10. The method according to claim 1, wherein, after turning the part product groups, the part product groups (7) are reversibly connected to each other in the row (2).
 11. The method according to claim 10, wherein a length of foil (30) is placed around the row (2) of part product groups (7) to connect the part product groups (7) to each other.
 12. An installation for serially supplying individual quantities of flat part products to a serial further processing, said installation comprising means for producing a row (2) of part product groups (7), each group comprising one of the said individual quantities of part products, means for fashioning the row (2) into a first-in-last-out storage formation, means for restoring the row (2) from the storage formation irrespective of time or place of the fashioning, and a means for separating part product groups (7) from the front end of the row (2) and for immediately supplying each separated group to the further processing, wherein the installation further comprises means for turning the part product groups by 180°, wherein said turning means is arranged upstream of the fashioning means and is equipped such that the region of the part product groups being the leading region before turning is the trailing region after turning.
 13. The installation according to claim 12, wherein the fashioning means and the restoring means are winding stations.
 14. The installation according to claim 12, wherein the means for separating and immediately supplying comprises grippers.
 15. The installation according to claim 12, wherein the means for producing the row (2) comprises a means for stabilizing the part products in the part product groups (7)
 16. The installation according to claim 12, wherein the installation further comprises means for connecting the part product groups (7) to each other in the row (2), the connecting means being arranged between the turning means and the fashioning means.
 17. The installation according to claim 12, wherein the means for turning the part product groups is a cell wheel. 